The science organization, Arachnid of Earth once sent a spaceship on a distinct planet to research the abnormal matter they found on it. During the mission, things turned out deadly for them. The backup team and Space Corps (The fleet which maintains the order and protects everyone from unwanted troubles of the universe) completed the task. When all of them are parting ways, they are all attacked by the cosmic entity. To save everyone, Space Corps officer Edwin Miller (29) decides to be the decoy even after knowing that he will be dead. However, the attack turned out to be a plan of Edwin and that Cosmic entity. Edwin is a human being, and due to some circumstances, now he works for the space corps.

That Cosmis entity turns out to be the Legendary knight from another dimension. That world is a creation of Zodiac Gods. An ancient world, where magic, elemental powers, and humans exist. For the betterment of that creation, they all sealed all dissenting force into those knights. There were three of them, and they were referred to as 'Knights of Doom' or Legendary Knights.

Centuries later, when the seal got weaken. The third knight escaped into this realm. The third knight is too powerful that the power of 12 Zodiacs gods combine can not defeat him. Also, they can not come to this dimension. They sent a second knight. The first Knight's power is still somewhere in that dimension (Zodiac God's). With the combined power of life force and that abnormal metal, that Cosmic entity managed to send Edwin to the world of Zodiac Gods and died. Things got messed up when Edwin reached that realm. He found himself as a 4-year-old kid with no memories of his previous life. The only thing that remains the same is his personality and his way of thinking. But, it didn't affect fate. The only good thing is that time and space are not relatable between these two realms.

He lived in that dimension, as he is born in it. He learned about all the history of Zodiac Gods and three legendary knights. After learning about the true purpose of his reincarnation during his adventures, he was sent back to his world dimension by the souls of Zodiac Gods. He attained the power of the first knight. Thanks to all of the things he experienced, learned, and kept in his heart. He defeats his Nemesis. In the end, it turns out that the third knight was just a puppet used by someone else. The real one is still threatening the universe.